The Pacific Sardine - Fisheries management and environmental variability

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Ralf Goericke
Sam McClatchie
Kevin Hill

The management of the Pacific sardine is currently based on an environmental parameter, the surface temperature measured at the Scripps Pier. In the past sardine recruitment and Pier temperature were related. However, once current data on recruitment are included in the analysis no significant relationship between Pier temperature and recruitment are evident. We observed that Pier temperature and temperature in the primary sardine habitat have diverged over the last decades. Thus we explored relationships between temperature in the Southern California Bight and sardine recruitment. A significant quadratic relationship was found between recruitment and deviations of temperature in the Southern California Bight from long-term trends. The utility of this relationship for the management of sardines has to be explored.